Add a helper to user generators as PHPUnit data providers

src/QCheck/DataProvider.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace QCheck;
+
+/**
+ * This class serves as a helper to create data providers
+ * for PHPUnit based testing.
+ *
+ * @package QCheck
+ */
+class DataProvider {
+    /**
+     * Transform an array of generators to an array of data that
+     * can be used for PHPUnit test methods.
+     *
+     * @param Generator[] $generators
+     * @param int $n number of data sets to generate.
+     * @return array
+     */
+    public function provider(array $generators, $n = 100) {
+        $tuples = call_user_func_array('QCheck\Generator::tuples', $generators);
+        return $tuples->takeSamples($n);
+    }
+}

test/QCheck/DataProvider.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace QCheck;
+
+class DataProviderTest extends \PHPUnit_Framework_TestCase {
+    function provider($name, $n = 10) {
+        return DataProvider::provider(array(
+            Generator::strings(),
+            Generator::ints(),
+            Generator::booleans()
+        ), $n);
+    }
+
+    /**
+     * @dataProvider provider
+     */
+    function testDataProvider($s, $i, $b) {
+        // this test is only supposed to prove that we have a valid provider
+        $this->assertTrue(is_string($s));
+        $this->assertTrue(is_int($i));
+        $this->assertTrue(is_bool($b));
+    }
+
+    function testDataProviderCount() {
+        $numbers = array(1, 10, 50);
+
+        foreach($numbers as $n) {
+            $data = $this->provider('testDataProviderCount', $n);
+            $this->assertCount($n, $data);
+            $this->assertCount(3, $data[0]);
+        }
+    }
+}